Algorithm of double grating monochromator transmittance function of rotational Raman radar
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1.
Department of Physics, The Electronic Engineering Institude of People's Liberation Army of China, Hefei 230037, China;
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2.
Key Laboratory of Atmospheric Composition and Optical Radiation, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China
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Received Date:
2015-04-24
Accepted Date:
2015-06-16
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Abstract
Transmission function of double grating monochromator plays an important role in rotational Raman lidar's simulation calculation of echo signal,the analysis of temperature inversion sensitivity,the selection of temperature inversion formula and so on. In order to study algorithm of double grating monochromator transmittance function, the sectional area ratio between light spot and output optical fiber was expressed by a variable. And then transmission function was given by the relationship of phase, intersection, tangent between light spot and output optical fiber cross section. 532nm double grating monochromator transmission function was analyzed in theory and verified in experiments. The results show that, central wavelength of 532nm double grating monochromator transmission curve is 529.0nm,530.3nm,533.8nm and 535.1nm respectively and the bandwidth is 0.48nm. The simulated echo signal and the measured echo signal are basically consistent. The calculation method of double grating monochromator transmittance function is correct.
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